In the wake of the Great Depression, two wars, and at the dawn of the cold war, President Dwight D Eisenhower viewed a 'national road' system as vital to the nation's interest on several counts: defense, commerce, safety, and unity. The Interstate Highway Act of 1956 created the vast network of superhighways and beltlines.
The Hoover Dam is recognized as one of the seven engineering wonders of the modern world. The construction of this behemoth dam was an incredible feat on many levels such as: years-long political disputes had to be settled, and roads, houses, and electricity had to be built and installed in the untouched environment of Black Canyon.
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